Jacob gkeen



i -nittt `titties stent @fitug IMPRG'VED'MBLTING All!) Sl/IEL'VING FURNAGB.

dtttrsntetnie mettettu'ailgtse l,ttttn's lntmt mit makina sarlat the samt.

LTO ALL 'WHOM Il MAY CONCERN: l

Be it knowu'that LJAGOB GBE-emot' Norristown, Montgomery county, Pennsylvania, have invented an Improved Melting and Smelting Furnace; and I do hereby declare the following to be a full, clear, and 'exact description of the same, reference being had to the `accompanyii'ig drawing,'andito the letters of reference marked thereon. D l v My invention consists of a furnace constructed and combined with certain blast and steam pipes, in the manner fully descrihed hereafter for the melting ofinletals and the'reduction of ores. I

In order to enable others skilled in the art to make and use my invention, I will now proceed to describe itsconstruction and operation, reference being had to the accompanying drawing, which forms a part of this specification, and in which- Figure l is a sectional elevation of my impl-oved melting and smelting furnace;

Figure 2, a sectional pla-u view ou the line 1 2, iig. 1.

Figure 3, a sectional elevation on the line 3-4, g.'2.

Figure flfasectioual elevation on the line 5-6,`lig. 2.'

Figure 5, a sectional elevation on the'line 7-8, iig. :2; and

Figure an inverted plan View of 'part of the furnace.

A A are the side walls; BB' the end walls; and C is the ltop ofthe furnace, at each end of `which is a fire-place, D. The tof, C, of the furnace is arched transversely and depressed in the centre, asshovwnin tig. 1, audt'nidwayvbetweeu'ltlie two relplaces is a. basin or bosh, E, at each side'of which is an inclined bed, At' thesideof' the wall. .AA are two chimneys or. stacks, GG, each of which communicates with the-furnace, one at the side of one bed and the other at the side` of' the other bed, the bottom of each stack being inclined towards the bed, as shown in g. 3. Atthe opposite side of the furnace are twoinclined chambersll H, each ot` wl1ich is closed at the o utec end hy a slab, b. In one of the side walls of each chamber H are openings, c c, and near the lower end of eachstack G. is an opening, e, for a purpose described hereafter. To a rod, i, extending across each lire-place D, are connected a number of grate-hars, m, which restV at ltheir outer ends on a rod, n., and beneath the bars is a shaft, o, armsouwhich bear against the under side of the bars so as lo alternately raise and loirer the same on vibrating-'the 'shaft'. In the wall A', opposite each fire-place, are openings, pp', which are furnished lwith .suitable doors, and in the wallopposite the basin E are openings, tt', tlig. 4.) From a blast pipe, lxexteod four branches al d,j`f, eachv oi' the pipes GZ passing' through the wall A into the ash-pit of one of the fire-places, and through eaclrend wall B, below theire-grate, passes a steam pipe, g. Eachof the branch 'pipes ff extends to anl `air-chamber,3, which com milnicates through openings, 's a, with the furnace, the said openings being'soinclined that jets of air passing through the same shall he directed on to the adjacent hed F.

. Each of the pipesfcls isA providedwith suitable 'stop-cocks 'for regulatiugthe admission ot'air or steam to the furnace.' When a metal is to' be extracted from masses of ore, the furnace is first thoroughly heated, the tireplace doors are closed, the ore and, limestone arethrown into the stacks'G G, Stoppers are placed inthe openings c, and slabs over the tops of thev stacks, the Stoppers and slabs being so formed as not to completely close the openings to which they are fitted. Air and steam are now admitted through the pipes df, and s into the` furnace, and as the yonly outlets for 'the gases are at the sides of the Stoppers of the openings c, and of the slabsy'at thetops of the chimneys, the heated gases ,will pass from the furnace into the stacks and among their contents.. After the material in the stacks has been sucie'ntlyheated or roasted a portion of the same is lmoved on 'to the beds F, where itis subjected to-the action of the blast from the openings en, by which theA heat 'is so concentrated on the mass ot ore as to quickly effect its reduction, the m'etal iiowing down the inclined 'beds into thebasn E, from which it is removed through the tapping hole t, the'slag being 'withdrawn through the opening t. Additional quantities of ore are from time to 'time thrown on to the inclined-bed H, while tlie stacks-are replenished at suitable intervals. The exit .openings are of such a size that the wil-ste gases can pas! but Slowly from the furnace g, there is, therefore, such'afslight draught or current that no purticlcsof metal can be carried to the stacks,.and such a circulation of thegases is produced without discharging the same from the furnace, as'will cause, their intimate admixture, and` their thorough combustion ortheircombiiation with thematerials-for whichl they have an auity. I'nasmuch-as the blast or heu-t 'is'oonceatratedon the ore,

the dispersion ef the heat, the. undue heating of parts of the furnace not required to be maintained at a high. temperature, and the waste of fuel are prevented. The blasts andjets of steam are so regulated that a pressure is maintained within the furnace, and the e'xternalpair is thus prevented from obtaining access to the interior except through the blast pipes, and thc contact of free oxygen with the ore and the formation of an okide of the metal are prevented. the air and steam from the blast pipes mingling so thoroughly with the heated gasesbefore coming in contact with the orc that their oxygen, being combined with carbon, is destroyed. The gases derived from the steam and air also enter in combination with the sulphur given off from' the coal and form sulphurous-acid, the sulphur being thus prevented from entering intoiujurious combination with the metal. When charcoal or other material is' combined with the ore before smelting the Ilatter, the pulverized materia!v is introduced into the* inclinedpassages H H," Stoppers are so fitted to the openings c'c as to permit a slight escape of gas round the same, and the material is thrown on to the beds F F, and smelted as before described. By th`e arrangement of two ire-places, beds, and a reservoir abope described, a most eiicie'nt, compact, and economical furnace isproduced. A furnace having but one tire-'place may, however, be used, and where but one character of orc is to be treated either the stacks G or the passages H may be dispensed with. v

Without confining myself to the precise construction and arrangement of parts herein described, I claim as my invention, and desire to secure 'by Letters Patentf 1. subjecting ores to the action of the products of combustion in a furnace where the gases are confined under pressure, substantially as and for the purpose described.

2. The combination, with a sme'lting furnace, of pipes through which currents of steam and ar can be introduced among the products of combustion previous to the latter being brought into contact with the ore, for the' purpose specified.

3. A blast pipe so arranged in respect to the hearth and the {ire-place of a smelting furnace as to direct thc products of combustion in a blast on to the hearth, for the purpose set forth. v

4. A chamber or chambers, H, through which the ore is admittedtovthe furnace, when the said chambers are arranged in respect to the bed-and to the fire-place, substantially as specified.

5. The {ire-place D, bed F, stack G, inclined passage H, with its openings c c, and reservoir E, all constructed and arranged substantially as and for the purpose set forth.

6. The combination of the tivo {irc-places D D, stacks G G, passages HH, beds F F, and the basin E, .the whole being constructed and arranged substantially as specified.

In testimony whereofI have signed my name to thisspccification in the presence of two subscribing witnesses.

JACOB GREEN.

Witnesses:-

CnAnLes E. Fos'rss, W. J. R. DELANY. 

